# Relationship history for MSHA mine 3608128

Current hierarchy: **Kenneth M  Pollock → Mt Carmel Co-Gen, Inc. → Mt. Carmel Co-Gen Culm Handling Facility**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Foster Wheeler Mt Carmel Inc → Mt. Carmel Co-Gen Culm Handling Facility; 1989-11-01 to 2001-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Foster Wheeler Corp → Mt. Carmel Co-Gen Culm Handling Facility; 1989-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Foster Wheeler Corp → Foster Wheeler Mt Carmel Inc; 1989-11-01 to 2001-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Mt Carmel Co-Gen, Inc. → Mt. Carmel Co-Gen Culm Handling Facility; 2002-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** El Paso Energy Corp → Mt. Carmel Co-Gen Culm Handling Facility; 2002-01-01 to 2002-10-31; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Energy Corp → Mt Carmel Co-Gen, Inc.; 2002-01-01 to 2002-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth M  Pollock et al → Mt. Carmel Co-Gen Culm Handling Facility; 2002-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth M  Pollock et al → Mt Carmel Co-Gen, Inc.; 2002-11-01 to current/open; source msha-controller-operator-history